code: def __repr__(self):
      return self.value
  
file_path: ray/python/ray/rllib/utils/debug/summary.py
imports: import numpy
  import pprint
  from typing import Any, Mapping
  from ray.rllib.policy.sample_batch import SampleBatch, MultiAgentBatch
  from ray.rllib.utils.annotations import DeveloperAPI
label_desc: Use image node_id 2 for calling the _StringValue obj's underlying member method code with example usage: obj.__repr__() and returns: self